<script>
import { computed } from "vue"
import { useStore } from "vuex"
export default {
    name: 'AppHeaderNav',
    setup(){
        const store = useStore()
        const list = computed(()=>{
            return store.state.category.list
        })
        const show = (item)=>{
            store.commit('category/show',item)
        }
        const hide = (item)=>{
            store.commit('category/hide',item)
        }
        return {list,show,hide}
    }
}
</script>

<template>
<ul class="app-header-nav">
    <li class="home"><RouterLink to="/">首页</RouterLink></li>
    <li v-for="item in list" :key="item.id" @mouseenter="show(item)" @mouseleave="hide(item)" @mousemove="show(item)">
      <RouterLink :to="`/category/${item.id}`" @click="hide(item)">{{item.name}}</RouterLink>
      <div class="layer" :class="{open:item.open}">
            <ul>
                <li v-for="sub in item.children" :key="sub.id">
                    <RouterLink :to="`/category/sub/${sub.id}`" @click="hide(item)">
                        <img :src="sub.picture" alt="">
                        <p>{{sub.name}}</p>
                    </RouterLink>
                </li>
            </ul>
        </div>
    </li>

</ul>
</template>

<style scoped lang="less">
@import '@/assets/styles/variables.less';
.app-header-nav {
  width: 820px;
  display: flex;
  justify-content: space-around;
  padding-left: 40px;
  position: relative; 
  z-index: 998;  
  > li {
    margin-right: 40px;
    width: 38px;
    text-align: center; 
    > a {
      font-size: 16px;
      line-height: 32px;
      height: 32px;
      display: inline-block;
    }
    &:hover {  
      > a {
        color: @xtxColor;
        border-bottom: 1px solid @xtxColor;
      }
    //   > .layer {
    //     height: 132px;
    //     opacity: 1;
    //   }
    }
  }
}
.layer {
  width: 1240px;
  background-color: #fff;
  position: absolute;
  left: -200px;
  top: 56px;
  height: 0;
  overflow: hidden;
  opacity: 0;
  box-shadow: 0 0 5px #ccc;
  transition: all .2s .1s;
  &.open{
    height: 132px;
    opacity: 1;
  }
  ul {
    display: flex;
    flex-wrap: wrap;
    padding: 0 70px;
    align-items: center;
    height: 132px;
    li {
      width: 110px;
      text-align: center;
      img {
        width: 60px;
        height: 60px;
      }
      p {
        padding-top: 10px;
      }
      &:hover {
        p {
          color: @xtxColor;
        }
      }
    }
  }
}
</style>